Last Update: July 6, 2014 (photo revisions)
flying......by Mike Sandlin
2 is a simple, slow flying biplane with a small motor.
Bloop 2 Technical Drawings
& Answers Page
Basic Ultralight Glider)
| Bloop 2 Technical
Drawings (93 pages).
These drawing downloads are free and may be used for
As bitmaps,in zip
folder download: Blooop
bitmaps, viewed online in Picasa : m-sandlin.info's
(The Picassa bitmap
drawings will be the first ones updated when
changes are made, the Picassa photo captions
describe the change, and the date on the drawing
will be that of the latest revision. Compare dates
of the CAD file drawings to the online versions to
see if changes have been made.)
In a CAD (Computer Assisted Design) format, requiring
a CAD program or viewer, zip
DXF drawings are not the best CAD for the Bloop
because they were produced from Turbocad TCW, they
are buggy, the groupings and layerings are
imperfect, the text had to be exloded and looks
crude. They are okay for viewing but not the best
for rework or modification).
In the native CAD format, highest quality, requiring a
zip folder download:
Bloop 1 Technical Drawings (92 pages).
drawings of the the previous version of the Bloop,
not the the current version, the
Bloop 2 (single
See the Photo Gallery for Bloop 1 photos.
As bitmaps, zip
download: Bloop 1 GIF1.zip
bitmaps, viewed online in Picasa : m-sandlin.info's
(The Picassa bitmap drawings will be the first ones
updated when changes are made, the Picassa photo
captions describe the change, and the date on the
drawing will be that of the
latest revision. Compare dates of the CAD file
drawings to the online versions to see if changes
have been made.)
a CAD (Computer Assisted Design) format, requiring a
CAD program or viewer, zip
drawings are not the best CAD for the Bloop because
they were produced from Turbocad TCW, they are
buggy, the groupings and layerings are imperfect,
okay for viewing but not the best for rework or
In the native CAD format, requiring a Turbocad
What is the idea ..?
A motorfloater is
an ultralight airplane with a small motor that flies very
slow. The pilot sits completely out in the open, flying in
a simple and easy way.
Flying a motorfloater is a lot like flying a paramotor but with
the stability, control, wind tolerance, and crash safety of a
light airplane or airchair. Exposed flight is
comfortable at low speeds, allows an excellent view, and
provides a special
kind of flight experience.
The motorfloater differs from other airplanes in having a very
light wing loading, allowing slow flight and tight turns. A motorfloater wing
loading is similar to that of a hang glider (less than 2
pounds of gross weight per square foot of wing), and it has a
light empty weight (United States FAR
Part 103 compliant, less than 254 lbs.). My idea of a
motorfloater differs from paramotors, powered hang
gliders, and microtrikes in having a tail (for pitch
stability), a fixed rigid wing (again for stability, without
deployable fabric canopy issues), and more fixed structure
around the pilot (for crash protection). A motorfloater does
not try to be everything that heavier airplanes are, it is
more of a motor scooter with wings.
I designed and
built the Bloop 2, a motorfloater, which has been flying since
July, 2012, and has proven to be an enjoyable recreational
airplane. Its measured level flight cruise speed is 24 miles
per hour, flying in the speed range of the hang gliders and
paramotors. It is perhaps the slowest airplane ever,
fulfilling its design goals.
use simple controls, garage technology construction, and a
paramotor engine. The stall and spin characteristics (if any)
should be very mild and forgiving, and an unaccelerated stall
with moderate weight pilots does not have any abrupt results.
At my weight I can fly with the control stick full back and
still maneuver, although the nose nods up and down, and the
sink rate is high. The emergency parachute is hand deployed,
as it might be on a hang glider or a trike, a realistic option
when the pilot is out in the open.
The Bloop is built mainly of aluminum tubes bolted together
and braced with braided steel cable, covered overall with
light but conventional aircraft fabric. This "garage
construction" involves using mostly a hand held power drill
and a hacksaw, not using any welding, sheet metal, specially
machined parts, jigs, molds, nor a spray rig.
The Bloop was origially the Pig glider, with an engine
added later. (See the Pig
for details on this airchair glider.) The Bloop 2
with engine and emergency parachute weighs about 194 pounds.
The power package is a modern paramotor
Vittorazi Moster 185 two stroke engine (25 hp.) with a 1.3
meter two bladed propeller (same for Bloop 1 and Bloop 2). The
engine is started by a rope pull (recoil) and uses synthetic
oil mixed into the Avgas fuel. In flight I use two
instruments: a tachometer (engine crankshaft speed in revolutions
per minute) and an exhaust gas temperature gage.
For simplicity, the Bloop has no
ailerons, the plane is controlled by the rudder (or
rudders) and elevator only. This is a traditional two axis
system (ala Weedhopper, Flying Flea, Skypup, early Quicksilver
MX, etc.) which requires two axis flying procedures. For
example, when you are rolling on the ground in a cross wind,
you keep the nose low so the weight is on the wheels, which
will keep the wings level. Taking off or landing in a
crosswind requires maintaining a crab angle rather than a slip
when the wheels are not on the ground. Ordinary flight
maneuvers are accomplished with the two axis system in
essentially the same way as the three axis system, such that
an experienced pilot may soon become indifferent as to
which system is in use.
I don't taxi much, I walk the plane to and from the runway,
which is practical with a well balanced airplane that isn't
heavy. A pilot who walks his plane instead of taxing can see
better, has better control, and is safely out of the plane if
extreme weather suddenly arrives. Walking the plane reserves
your hot engine time for flying instead of ground travel, and
it avoids raising dust and making noise at the airport. In consideration of
other air and runway traffic, the Bloop can scoot
onto or off the runway with the pilot seated
It is often asked why the Bloop does not use a more
conventional landing gear system, with a tail wheel or nose
wheel. My answer is that I have not seen a conventional nose
wheel or tail wheel setup that would allow for high wind
safety at this low wing loading. A motorfloater must
be able to roll with the nose low and stop with the nose down,
firmly gripping the ground, so it will not be blown away. The wheels of the
Bloop are located near the center of lift, so the
pilot can choose stop on the tail skid or the nose
start and stop positions in substantial wind are expected to
be nose down on the skid, like a sailplane trainer
or an airchair glider.
Bloop 2 has been tied down outside at my local
airstrip for two years now, with plastic tarps over
the engine and cockpit areas, and I find this to be
convenient and satisfactory. Others may use hangars
or folding wings, but I can get flying just as fast
and without all the fuss. I don't recall the last
time I used a hard surface runway or ailerons, and I
don't miss either one.
is intended to suggest a kind of combination blimp and plane,
a slow and casual flier. Hot pilots who want
speed and thunder will have little interest in the Bloop.
Motorfloaters are for the other kind of flying. The Bloop
is a "put-put" for local flights, just for fun. This is a
non-commercial project, so nothing is for sale, but I
encourage commercial production of a motorfloater like this.
All of the materials on my websites are freely available for
whatever purposes the user may desire.
What is the plan ..?
The Bloop 2 prototype flies on, exploring the benefits of slow flight,
including the experience of open air flying, simple controls, and
Flying a motorfloater should be
the easiest and safest way to fly, with airplanes designed for gentle and predictable handling, slow flight, simple controls, and crash
safety. The ability of the
motorfloater to keep flying under control even at the lowest
airspeeds, with no stall or spin hazard, is similar to the flying of some light trikes and hang gliders, but
with easier control and superior crash protection for the pilot.
Low burden access to simple recreational
airplane flying might be provided by building an airplane that flies
like a paramotor. Flying at the same airspeed, with the same engine,
seated position, same instruments, and very nearly the same controls,
a pilot who has entered aviation by paramotor might easily transition
to a motorfloater. This might be a "single seat" transition, guided by
the local paramotor instructor who is now also the local motorfloater
For developments see the Bloop
The pilot decides whether to stop on the nose skid
or the tail skid.
view with good ventilation
only the rudder pedals are used for turning.